For those of you with a car that doesn't have insanely complex electronics comes this project from Instructables user 'thematthewknot'. He has added RFID via an Arduino to the central locking system of his car which grants him keyless entry. The reader is placed just behind the B-pillar and works well through the glass. If the car is unlocked it automatically locks after 25 seconds. You can see it in action below:
If you make a system like this, be sure to allow a method for people to escape the car in an emergency! This would also be a great solution for other RFID access projects at home, work and so on. So to get started visit the project page here. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
If you're an experienced Arduino user and interested in more advanced Arduino projects such as RFID - get yourself a copy of "Practical Arduino" by Jonathan Oxer and Hugh Blemings:
Create your own Arduino-based designs, gain an in-depth knowledge of the architecture of Arduino, and learn the easy-to-use Arduino language all in the context of practical projects that you can build yourself at home. Get hands-on experience using a variety of projects and recipes for everything from home automation to test equipment. For more information and to order, click here.